161436469 has 2 divisors, whose sum is σ = 161436470. Its totient is φ = 161436468.

The previous prime is 161436461. The next prime is 161436479. The reversal of 161436469 is 964634161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140138244 + 21298225 = 11838^2 + 4615^2 .

It is a cyclic number.

It is not a de Polignac number, because 161436469 - 2³ = 161436461 is a prime.

It is a super-2 number, since 2×161436469² = 52123467046375922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161436461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80718234 + 80718235.

It is an arithmetic number, because the mean of its divisors is an integer number (80718235).

Almost surely, 2^161436469 is an apocalyptic number.

It is an amenable number.

161436469 is a deficient number, since it is larger than the sum of its proper divisors (1).

161436469 is an equidigital number, since it uses as much as digits as its factorization.

161436469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 40.

The square root of 161436469 is about 12705.7651875045. The cubic root of 161436469 is about 544.5033423887.

It can be divided in two parts, 1614 and 36469, that added together give a palindrome (38083).

The spelling of 161436469 in words is "one hundred sixty-one million, four hundred thirty-six thousand, four hundred sixty-nine".